Datasheet

AD5378
Rev. A | Page 3 of 28
GENERAL DESCRIPTION
The AD5378 contains 32 14-bit DACs in one CSPBGA package.
The AD5378 provides a bipolar output range determined by the
voltages applied to the V
REF
(+) and V
REF
(−) inputs. The maximum
output voltage span is 17.5 V, corresponding to a bipolar output
range of −8.75 V to +8.75 V, and is achieved with reference volt-
ages of V
REF
(−) = −3.5 V and V
REF
(+) = +5 V.
The AD5378 guarantees operation over a wide V
SS
/V
DD
supply
range from ±11.4 V to ±16.5 V. The output amplifier headroom
requirement is 2.5 V operating with a load current of 1.5 mA,
and 2 V operating with a load current of 0.5 mA.
The AD5378 contains a double-buffered parallel interface in
which 14 data bits are loaded into one of the input registers
under the control of the
WR
,
CS
, and DAC channel address
pins, A0 to A7. It also has a 3-wire serial interface, which is
compatible with SPI®, QSPI™, MICROWIRE™, and DSP inter-
face standards and can handle clock speeds of up to 50 MHz.
The DAC outputs are updated when the DAC registers receive
new data. All the outputs can be updated simultaneously by
taking the
LDAC
input low. Each channel has a programmable
gain and an offset adjust register.
Each DAC output is gained and buffered on-chip with respect
to an external REFGND input. The DAC outputs can also be
switched to REFGND via the
CLR
pin. Table 1 and Table 2
show the product portfolio for high channel count bipolar and
unipolar voltage output DACs.
Table 1. 40-Channel, Bipolar, Voltage Output DAC
Model Resolution Analog Supplies
Output
Channels Linearity Error (LSB)
Package
Description Package Option
AD5379ABC 14 Bits ±11.4 V to ±16.5 V 40 ±3 108-Lead CSPBGA BC-108
Table 2. High Channel Count, Low Voltage, Single-Supply DACs
Model Resolution AV
DD
Range
Output
Channels Linearity Error (LSB)
Package
Description Package Option
AD5380BST-5 14 Bits 4.5 V to 5.5 V 40 ±4 100-Lead LQFP ST-100
AD5380BST-3 14 Bits 2.7 V to 3.6 V 40 ±4 100-Lead LQFP ST-100
AD5381BST-5 12 Bits 4.5 V to 5.5 V 40 ±1 100-Lead LQFP ST-100
AD5381BST-3 12 Bits 2.7 V to 3.6 V 40 ±1 100-Lead LQFP ST-100
AD5384BBC-5 14 Bits 4.5 V to 5.5 V 40 ±4 100-Lead CSPBGA BC-100
AD5384BBC-3 14 Bits 2.7 V to 3.6 V 40 ±4 100-Lead CSPBGA BC-100
AD5382BST-5 14 Bits 4.5 V to 5.5 V 32 ±4 100-Lead LQFP ST-100
AD5382BST-3 14 Bits 2.7 V to 3.6 V 32 ±4 100-Lead LQFP ST-100
AD5383BST-5 12 Bits 4.5 V to 5.5 V 32 ±1 100-Lead LQFP ST-100
AD5383BST-3 12 Bits 2.7 V to 3.6 V 32 ±1 100-Lead LQFP ST-100
AD5390BST-5 14 Bits 4.5 V to 5.5 V 16 ±3 52-Lead LQFP ST-52
AD5390BCP-5 14 Bits 4.5 V to 5.5 V 16 ±3 64-Lead LFCSP CP-64
AD5390BST-3 14 Bits 2.7 V to 3.6 V 16 ±4 52-Lead LQFP ST-52
AD5390BCP-3 14 Bits 2.7 V to 3.6 V 16 ±4 64-Lead LFCSP CP-64
AD5391BST-5 12 Bits 4.5 V to 5.5 V 16 ±1 52-Lead LQFP ST-52
AD5391BCP-5 12 Bits 4.5 V to 5.5 V 16 ±1 64-Lead LFCSP CP-64
AD5391BST-3 12 Bits 2.7 V to 3.6 V 16 ±1 52-Lead LQFP ST-52
AD5391BCP-3 12 Bits 2.7 V to 3.6 V 16 ±1 64-Lead LFCSP CP-64
AD5392BST-5 14 Bits 4.5 V to 5.5 V 8 ±3 52-Lead LQFP ST-52
AD5392BCP-5 14 Bits 4.5 V to 5.5 V 8 ±3 64-Lead LFCSP CP-64
AD5392BST-3 14 Bits 2.7 V to 3.6 V 8 ±4 52-Lead LQFP ST-52
AD5392BCP-3 14 Bits 2.7 V to 3.6 V 8 ±4 64-Lead LFCSP CP-64